import java.util.Scanner;

public class java2 {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int a,b,c;
		a=sc.nextInt();
		b=sc.nextInt();
		c=sc.nextInt();
		int t=0;
		if((a+b)>c && (a+c)>b && (b+c)>a) {
			if(a<b) {
				t=a;
				a=b;
				b=a;
				if(a<c) {
					t=a;
					a=c;
					c=t;
					if(a*a==b*b+c*c) {
						System.out.println("yes");
					}else {
						System.out.println("no");
					}
				}else {
					if(a*a==b*b+c*c) {
						System.out.println("yes");
					}else {
						System.out.println("no");
					}
				}
			}else {
				if(a<c) {
					t=a;
					a=c;
					c=t;
					if(a*a==b*b+c*c) {
						System.out.println("yes");
					}else {
						System.out.println("no");
					}
				}else {
					if(a*a==b*b+c*c) {
						System.out.println("yes");
					}else {
						System.out.println("no");
					}
				}
			}
		}else {
			System.out.println("not a trianglt");
		}sc.close();
	}
}
	
	


	